Four Ways We Know the Democratic Peace Correlation Does Not Exist in the State of Knowledge

Abstract Multiple studies have shown that when advanced-market “contract-intensive” economy is considered in a regression of fatal militarized interstate disputes, crises, or wars, the democratic peace correlation, the observed dearth of militarized conflict between democratic nations, becomes near zero and insignificant. Defenders of the existence of a correlation of democracy with peace claim these studies contain multiple errors. This article examines the state of evidence behind all claims in this debate. Four crucial facts are identified: (1) There is no report in print that shows democracy significant in a regression of fatal disputes controlling for contractualist economy that is unencumbered with controversial practices; (2) Every empirical defense of democracy has been rebutted, and the rebuttals remain uncontested; (3) There is no democratic peace in the nineteenth century, when there were no contractualist dyads but were democratic dyads; and (4) New analyses with revised direct data on contractualist economy covering 94% of observations over the largest-observed 1920–2010 period show that democracy without contractualist economy has a near-zero correlation with peace. Together, these facts inform us that there are no scientific grounds for deeming the democratic peace correlation as existing in the state of knowledge.